MooTrackView.java

   1 import javax.swing.*;
   2 import java.awt.*;
   3 import java.awt.event.*;
   4 import javax.sound.midi.*;
   5 import java.util.*;
   6
   7 /**
   8  * Graphical representation of a MIDI track.
   9  *
  10  * @author  Andersson , Andreen, Lanneskog, Pehrson
  11  * @version 1
  12  */
  13
  14 public class MooTrackView extends JPanel implements ActionListener {
  15
  16         private Track track;
  17         private MooTrackTitle title;
  18         private NoteArea notes;
  19         private Rectangle box;
  20         private JPopupMenu popup;
  21         private JPopupMenu notePopup;
  22         private JMenuItem menuItem;
  23         protected static int viewLength = 0;
  24         public static final int NOTE_HEIGHT = 10, NOTE_WIDTH = 40, VIEW_WIDTH = 200;
  25
  26         public MooTrackView (Track track) {
  27                 super(true);
  28                 this.track = track;
  29                 //setPreferredSize(new Dimension(200, 9000));
  30                 setLayout(new BorderLayout());
  31                 // setBorder(BorderFactory.createLineBorder(Color.black));
  32
  33                 //title = new MooTrackTitle(track);
  34                 //title.setBorder(BorderFactory.createLineBorder(Color.black));
  35                 //add(title, BorderLayout.NORTH);
  36
  37                 notes = new NoteArea(track);
  38                 notes.setBackground(Color.white);
  39                 notes.setBorder(BorderFactory.createLineBorder(Color.black));
  40
  41                 popup = new JPopupMenu();
  42                 menuItem = new JMenuItem("Add...");
  43                 menuItem.addActionListener(this);
  44                 popup.add(menuItem);
  45
  46
  47                 notePopup = new JPopupMenu();
  48                 menuItem = new JMenuItem("Preferences...");
  49                 menuItem.addActionListener(this);
  50                 notePopup.add(menuItem);
  51
  52                 notes.addMouseListener(new PopupListener());
  53                 add(notes, BorderLayout.CENTER);
  54         }
  55
  56         public void actionPerformed(ActionEvent e) {}
  57
  58         public Track getTrack() {
  59                 return track;
  60         }
  61
  62
  63         /**
  64          * Updates the track view.
  65          */
  66         public void update(long tickPosition) {
  67                 repaint();
  68         }
  69
  70         class NoteArea extends JPanel {
  71                 public static final int NOTE_HEIGHT = 10, NOTE_WIDTH = 40, VIEW_WIDTH = 200;
  72                 private ArrayList rects;
  73
  74                 public NoteArea(Track track) {
  75                         // Configuring panel
  76                         super(true);
  77                         setLayout(null);
  78                         setPreferredSize(new Dimension(VIEW_WIDTH, 140 * NOTE_HEIGHT));
  79
  80                         // Creating temporary variables
  81                         MidiEvent note;
  82                         MooNoteElement elem;
  83                         int x, y, height;
  84                         int beatsPerSixteenth = Moosique.getSequence().getResolution() / 4;
  85                         rects = new ArrayList(track.size() / 2);
  86
  87                         // Placing note elements
  88                         Insets insets = getInsets();
  89                         for (int i = 0; i < track.size(); i++) {
  90                                 note = track.get(i);
  91                                 if (note instanceof MooNote) {
  92                                         // Adds the note element to the note area.
  93                                         MooNote mn = (MooNote)note;
  94                                         elem = new MooNoteElement(mn);
  95                                         add(elem);
  96
  97                                         // Moves the note element to the appropriate place.
  98                                         x = insets.left;
  99                                         y = insets.top + (int)(mn.getTick() / beatsPerSixteenth) * NOTE_HEIGHT;
 100                                         height = (mn.getDuration() / beatsPerSixteenth) * NOTE_HEIGHT;
 101                                         if (height == 0) height = NOTE_HEIGHT;
 102                                         Rectangle r = new Rectangle(x, y, NOTE_WIDTH, height);
 103                                         while(isOccupied(r)) r.translate(NOTE_WIDTH, 0);
 104                                         elem.setBounds(r);
 105                                         rects.add(r);
 106                                         if (viewLength < (y + height)) viewLength = y + height;
 107                                 }
 108                                 setPreferredSize(new Dimension(VIEW_WIDTH, viewLength));
 109                         }
 110                         validate();
 111                 }
 112
 113                 private boolean isOccupied(Rectangle r) {
 114                         Iterator it = rects.iterator();
 115                         while (it.hasNext()) {
 116                                 if(r.intersects((Rectangle)it.next())) return true;
 117                         }
 118                         return false;
 119                 }
 120
 121                 public void paintComponent(Graphics g) {
 122                         super.paintComponent(g);
 123                         Graphics2D g2 = (Graphics2D)g;
 124                         for (int c = 0; c < viewLength || c < getHeight(); c += NOTE_HEIGHT) {
 125                                 for (int r = 0; r < (10 * NOTE_WIDTH); r += NOTE_WIDTH) {
 126                                         box = new Rectangle(r, c, NOTE_WIDTH, NOTE_HEIGHT);
 127                                         g2.setColor(Color.gray);
 128                                         g2.draw(box);
 129                                 }
 130                         }
 131                 }
 132         }
 133
 134         class PopupListener extends MouseAdapter {
 135                 public void mousePressed(MouseEvent e) {
 136                         maybeShowPopup(e);
 137                 }
 138
 139                 public void mouseReleased(MouseEvent e) {
 140                         maybeShowPopup(e);
 141                 }
 142
 143                 private void maybeShowPopup(MouseEvent e) {
 144                         if (e.isPopupTrigger()) {
 145                                 if (findComponentAt(e.getX(), e.getY()) instanceof MooNoteElement)
 146                                         notePopup.show(e.getComponent(), e.getX(), e.getY());
 147                                 else
 148                                         popup.show(e.getComponent(), e.getX(), e.getY());
 149                         }
 150                 }
 151         }
 152 }